tools/usb/usbip/libsrc/usbip_host_common.h

   1 /*
   2  * Copyright (C) 2015-2016 Samsung Electronics
   3  *               Igor Kotrasinski <i.kotrasinsk@samsung.com>
   4  *               Krzysztof Opasiak <k.opasiak@samsung.com>
   5  *
   6  * Refactored from usbip_host_driver.c, which is:
   7  * Copyright (C) 2011 matt mooney <mfm@muteddisk.com>
   8  *               2005-2007 Takahiro Hirofuchi
   9  *
  10  * This program is free software: you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License as published by
  12  * the Free Software Foundation, either version 2 of the License, or
  13  * (at your option) any later version.
  14  *
  15  * This program is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  18  * GNU General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU General Public License
  21  * along with this program. If not, see <http://www.gnu.org/licenses/>.
  22  */
  23
  24 #ifndef __USBIP_HOST_COMMON_H
  25 #define __USBIP_HOST_COMMON_H
  26
  27 #include <stdint.h>
  28 #include <libudev.h>
  29 #include <errno.h>
  30 #include "list.h"
  31 #include "usbip_common.h"
  32 #include "sysfs_utils.h"
  33
  34 struct usbip_host_driver;
  35
  36 struct usbip_host_driver_ops {
  37         int (*open)(struct usbip_host_driver *hdriver);
  38         void (*close)(struct usbip_host_driver *hdriver);
  39         int (*refresh_device_list)(struct usbip_host_driver *hdriver);
  40         struct usbip_exported_device * (*get_device)(
  41                 struct usbip_host_driver *hdriver, int num);
  42
  43         int (*read_device)(struct udev_device *sdev,
  44                            struct usbip_usb_device *dev);
  45         int (*read_interface)(struct usbip_usb_device *udev, int i,
  46                               struct usbip_usb_interface *uinf);
  47         int (*is_my_device)(struct udev_device *udev);
  48 };
  49
  50 struct usbip_host_driver {
  51         int ndevs;
  52         /* list of exported device */
  53         struct list_head edev_list;
  54         const char *udev_subsystem;
  55         struct usbip_host_driver_ops ops;
  56 };
  57
  58 struct usbip_exported_device {
  59         struct udev_device *sudev;
  60         int32_t status;
  61         struct usbip_usb_device udev;
  62         struct list_head node;
  63         struct usbip_usb_interface uinf[];
  64 };
  65
  66 /* External API to access the driver */
  67 static inline int usbip_driver_open(struct usbip_host_driver *hdriver)
  68 {
  69         if (!hdriver->ops.open)
  70                 return -EOPNOTSUPP;
  71         return hdriver->ops.open(hdriver);
  72 }
  73
  74 static inline void usbip_driver_close(struct usbip_host_driver *hdriver)
  75 {
  76         if (!hdriver->ops.close)
  77                 return;
  78         hdriver->ops.close(hdriver);
  79 }
  80
  81 static inline int usbip_refresh_device_list(struct usbip_host_driver *hdriver)
  82 {
  83         if (!hdriver->ops.refresh_device_list)
  84                 return -EOPNOTSUPP;
  85         return hdriver->ops.refresh_device_list(hdriver);
  86 }
  87
  88 static inline struct usbip_exported_device *
  89 usbip_get_device(struct usbip_host_driver *hdriver, int num)
  90 {
  91         if (!hdriver->ops.get_device)
  92                 return NULL;
  93         return hdriver->ops.get_device(hdriver, num);
  94 }
  95
  96 /* Helper functions for implementing driver backend */
  97 int usbip_generic_driver_open(struct usbip_host_driver *hdriver);
  98 void usbip_generic_driver_close(struct usbip_host_driver *hdriver);
  99 int usbip_generic_refresh_device_list(struct usbip_host_driver *hdriver);
 100 int usbip_export_device(struct usbip_exported_device *edev, int sockfd);
 101 struct usbip_exported_device *usbip_generic_get_device(
 102                 struct usbip_host_driver *hdriver, int num);
 103
 104 #endif /* __USBIP_HOST_COMMON_H */